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Gets or sets the file name extension of the target file.
Namespace:  Microsoft.SharePoint.Publishing.WebControls
Assembly:  Microsoft.SharePoint.Publishing (in Microsoft.SharePoint.Publishing.dll)
Syntax
'Declaration
Public Property AppendFileExtension As String
    Get
    Set
'Usage
Dim instance As DocumentLibraryFileExistValidator
Dim value As String
value = instance.AppendFileExtension
instance.AppendFileExtension = value
public string AppendFileExtension { get; set; }
Property Value
Type: System.String
A string that specifies the file name extension.
See Also
Reference
DocumentLibraryFileExistValidator Class